625b1578fa
Update the osbuild/images to the version which introduces "dot notation" for distro release versions. - Replace all uses of distroregistry by distrofactory. - Delete local version of reporegistry and use the one from the osbuild/images. - Weldr: unify `createWeldrAPI()` and `createWeldrAPI2()` into a single `createTestWeldrAPI()` function`. - store/fixture: rework fixtures to allow overriding the host distro name and host architecture name. A cleanup function to restore the host distro and arch names is always part of the fixture struct. - Delete `distro_mock` package, since it is no longer used. - Bump the required version of osbuild to 98, because the OSCAP customization is using the 'compress_results' stage option, which is not available in older versions of osbuild. Signed-off-by: Tomáš Hozza <thozza@redhat.com>
68 lines
1.6 KiB
Go
68 lines
1.6 KiB
Go
package graphdriver
|
|
|
|
import "sync"
|
|
|
|
type minfo struct {
|
|
check bool
|
|
count int
|
|
}
|
|
|
|
// RefCounter is a generic counter for use by graphdriver Get/Put calls
|
|
type RefCounter struct {
|
|
counts map[string]*minfo
|
|
mu sync.Mutex
|
|
checker Checker
|
|
}
|
|
|
|
// NewRefCounter returns a new RefCounter
|
|
func NewRefCounter(c Checker) *RefCounter {
|
|
return &RefCounter{
|
|
checker: c,
|
|
counts: make(map[string]*minfo),
|
|
}
|
|
}
|
|
|
|
// Increment increases the ref count for the given id and returns the current count
|
|
func (c *RefCounter) Increment(path string) int {
|
|
return c.incdec(path, func(minfo *minfo) {
|
|
minfo.count++
|
|
})
|
|
}
|
|
|
|
// Decrement decreases the ref count for the given id and returns the current count
|
|
func (c *RefCounter) Decrement(path string) int {
|
|
return c.incdec(path, func(minfo *minfo) {
|
|
minfo.count--
|
|
})
|
|
}
|
|
|
|
func (c *RefCounter) incdec(path string, infoOp func(minfo *minfo)) int {
|
|
c.mu.Lock()
|
|
m := c.counts[path]
|
|
if m == nil {
|
|
m = &minfo{}
|
|
c.counts[path] = m
|
|
}
|
|
// if we are checking this path for the first time check to make sure
|
|
// if it was already mounted on the system and make sure we have a correct ref
|
|
// count if it is mounted as it is in use.
|
|
if !m.check {
|
|
m.check = true
|
|
if c.checker.IsMounted(path) {
|
|
m.count++
|
|
}
|
|
} else if !c.checker.IsMounted(path) {
|
|
// if the unmount was performed outside of this process (e.g. conmon cleanup)
|
|
// the ref counter would lose track of it. Check if it is still mounted.
|
|
m.count = 0
|
|
}
|
|
infoOp(m)
|
|
count := m.count
|
|
if count <= 0 {
|
|
// If the mounted path has been decremented enough have no references,
|
|
// then its entry can be removed.
|
|
delete(c.counts, path)
|
|
}
|
|
c.mu.Unlock()
|
|
return count
|
|
}
|